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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MAX17843 датащи(PDF) 64 Page - Maxim Integrated Products |
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MAX17843 датащи(HTML) 64 Page - Maxim Integrated Products |
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64 / 131 page  Diagnostics Built-in diagnostics support ISO 26262 (ASIL) requirements by detecting specific fault conditions, as shown in Table 34. The device automatically performs some of the diagnostics while the host can perform others during initialization (e.g., at key-on), or periodically during operation, as required by the application. Diagnostics performed automatically by the device are previously described in the relevant functional sections. A description of the diagnostics requiring specific configurations are provided in this section. Table 34. Summary of Built-In Diagnostics DIAGNOSTICS PERFORMED AUTOMATICALLY BY DEVICE, WITHOUT HOST INTERVENTION FAULT DIAGNOSTIC PROCEDURE OUTPUT VAA undervoltage Continuous voltage comparison ALRTRST VHV undervoltage Continuous voltage comparison ALRTHVUV VHV overvoltage Continuous voltage comparison ALRTHVOV VHV low headroom Voltage comparison – updated during measurement ALRTHVHDRM 32kHz oscillator fault Continuous frequency comparison ALRTOSC1, ALRTOSC2 16MHz oscillator fault Communication error checking ALRTMAN, ALRTPAR Communication fault Communication error checking ALRTPEC, ALRTMAN, ALRTPAR RX pin open/short Verify RX mode after POR ALRTCOMMSEUn/ALRTCOMMSELn VDDLx pin open/short Continuous voltage comparison ALRTVDDLx GNDLx pin open/short Continuous voltage comparison ALRTGNDLx Die over-temperature temperature comparison – updated after measurement. ALRTTEMP DIAGNOSTICS PERFORMED DURING ACQUISITION MODE, AS SELECTED BY DIAGSEL OR BALSWDIAG FAULT DIAGNOSTIC PROCEDURE DIAGSEL[2:0] OUTPUT Reference voltage fault ALTREF diagnostic DIAGSEL = 1h DIAG[15:0] (ALTREF voltage) VAA voltage fault VAA diagnostic ADC1 DIAGSEL = 2h DIAG[15:0] (VAA voltage) VAA voltage fault VAA diagnostic ADC2 DIAGSEL = 2h DIAG[15:0] (VAA /2 voltage) LSAMP Offset too high LSAMP offset diagnostic DIAGSEL = 3h DIAG[15:0] (LSAMP offset voltage) ADC bit stuck high Zero-Scale ADC diagnostic DIAGSEL = 4h DIAG[15:0] (Zero-scale) ADC bit stuck low Full-Scale ADC diagnostic DIAGSEL = 5h DIAG[15:0] (Full-scale) VPTAT or ALRTTEMP fault Die Temperature diagnostic DIAGSEL = 6h DIAG[15:0] (VPTAT voltage), ALRTTEMP Balancing switch short BALSW diagnostic mode BALSWDIAG = 1h ALRTBALSW Balancing switch open BALSW diagnostic mode BALSWDIAG = 2h ALRTBALSW Odd sense-wire open BALSW diagnostic mode BALSWDIAG = 5h ALRTBALSW Even sense-wire open BALSW diagnostic mode BALSWDIAG = 6h ALRTBALSW MAX17843 12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface www.maximintegrated.com Maxim Integrated │ 64 |
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